Harvest Time Tracker for iPhone is just one piece of the puzzle. It is used in conjunction with Harvest, the online subscription-based time tracking and invoicing system. While this app allows you to track time for the projects you are working on, management, invoicing, and expense tracking of those projects are handled by the online system.

Appigo Notebook differentiates itself from the competition by offering tight integration with Todo, a task management app also by Appigo. It also offers numerous formatting options, the ability to sync notes with a free online service, full text searching, the ability to create multiple notebooks, and more.

Appigo Todo is a task management app with a streamlined user interface. It includes ways to tag and otherwise set todo items apart, robust search and filtering, and is augmented by several synchronization options as well as tight integration with Appigo Notebook, a note taking app available from the same author.